31689950 has 12 divisors (see below), whose sum is σ = 58943400. Its totient is φ = 12675960.

The previous prime is 31689949. The next prime is 31689961. The reversal of 31689950 is 5998613.

It is a junction number, because it is equal to n+sod(n) for n = 31689898 and 31689907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 316850 + ... + 316949.

It is an arithmetic number, because the mean of its divisors is an integer number (4911950).

Almost surely, 2^31689950 is an apocalyptic number.

31689950 is a deficient number, since it is larger than the sum of its proper divisors (27253450).

31689950 is a wasteful number, since it uses less digits than its factorization.

31689950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633811 (or 633806 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 31689950 is about 5629.3827370325. The cubic root of 31689950 is about 316.4515189865.

The spelling of 31689950 in words is "thirty-one million, six hundred eighty-nine thousand, nine hundred fifty".